Industrial Technology Research Institute

Yen-Bin Gu

Ming-Jer Chen

Po-Chin Hsu

Wei-Chen Shen

Tien-Yu Wu

Chu-Chang Lin

This invention deals with the problem of an error voltage in a MOSFET analog switch sample and hold circuit caused by the turn off charge in the MOSFET analog switch. The invention provides a compensating circuit which can be adjusted to exactly compensate for the turn off charge which causes the error so that the error can be reduced to zero or nearly zero. The compensating circuit can be used in both open loop and closed loop sample and hold circuits. The compensating circuit can be used in combination with a Miller feedback circuit for eliminating the error voltage.

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Taipei, Taiwan

Yen-Bin Gu